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(No'Mod'eL) C. E. SCRIBNER.

SWITCHING APPARATUS FOR INGANDESOENT ELECTRIC LAMPS. No. 529,582. Patented Nov. 20, 1894.

MAE 22E 5555.

zmm m I iAmr/esjcrz nex 2980. 7 zfiz arzzzf UNITED STATES PATENT OFFICE.

CHARLES E. SCRIBNER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WESTERN ELECTRIC COMPANY, OF SAME PLACE.

SWITCHING APPARATUS FOR INCANDESCENT ELECTRIC LAMPS.

SPECIFICATION forming part of Letters Patent No. 529,532, dated November 20, 1894.

Application fi1 dApril23,1389. Seriallio. 308,270- (No model.)

To all whom it may concern.-

Be it known that I, CHARLES E. SCRIBNER, a citizen of the United States, residing at Chicago, in the county of Cook and State of lili- 5 nois, have invented a certain new and useful Improvement in Switching Apparatus for Incandescent Lamps, (Case No. 197,) of which the following isafull, clear, concise, and exact description, reference being had to the ac- IO companying drawing, forming a part of this specification.

The object of my invention is to provide for the turning 01f or on an incandescent lamp or lamps from two different points. For exampie, in state rooms one lamp has been provided with a switch for turning it off and on at one only of two berths.

By the use of my invention the occupant of either berth may turn the lamp off or on by simply moving a switch.

My invention consists in a switch at each of two stations or at different parts of a room connected with a circuit containing an incandescent lamp or other translating device, said switches being adapted to be moved between two contact points, said contact points of the two stations being connected together and so arranged that no matter what may be the condition of the lamp whether in circuit or out of circuit the movement of a switch at either station will serve to bring it into circuit if the circuit is open, and in case the circuit is closed movement of the switch at either station will open the circuit to put out the lamp.

My invention will be readily understood by reference to the accompanying drawing, in which an incandescent lamp a is shown in circuit between the mains b c.

The object of my invention is to provide means whereby this lamp may be lighted or put out from either of two stations 1 and 2.

The switch 01 is connected with the wire 6 which extends through the lamp to the main 7). This switch is adapted to move between 5 contact pointsf g to close the wire 6 to either of said points as may be desired by any one at station 1. At station 2 I have provided a similar switch it which is connected with the wire leading to the main 0. This switch his adapted to close the said wire to contact'i or contact 70 as may be desired by the person at station 2. It will be seen that contact f is connected with contact t and contact 9 with contact 7;. Thus the contacts of the different stations are extended, so to speak, to form cor- 5 5 responding contacts at the other station. The switches d and h have each two positions; that is to say, switch cl must be in contact with contact for in contact with contact g. Switch h on the other hand must be closed either to contact 4 or contact 75. Now no m atter which of these normal positions the switches may occupy respectivelya change of either from. one position to its other position will either open the circuit of wire e between the leads or mains b c or such movement will close the circuit through the lamp between said leads. As shown the lamp a is in circuit. Move switch it to switch 70. The circuit of the lamp is now open at contact t, or, sup- 7o pose switch f moved from contact f to contact g. The circuit of the lamp will be open. Suppose now the lamp to be put out say by switch f being moved to contact g. The person at station 2 may readily bring it into circuit by moving switch 72- to switch 70. The wire Z connecting the contacts fand 1' is the counterpart of the wire m connecting the contacts g and 70. In moving the switches at and it back and forth between their contacts we shall have one or the other of these wires included in the circuit between the mains as shown or we slraji have one of said wires connected at one end withnile main and the other wire connected atone end with the other main. Therefore, moving the switch cl or the switch It will change the previous existing condition of the lamp putting it out or lighting it as the case may be.

I do not limit myself to any particular form of switching device at the different stations. A switch, however, at each station is an essential feature of my invention each of these switches being adapted to change the current from the main from one wire as wire Z to 5 another wire as wire m,-said wires reciprocally connecting together contact points as ft' and g It of the different stations.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent---- 1. The combination with the positive and negative mains of an electric light system, of a branch from one of the mains including an incandescent lamp, the said branch being permanently connected to the lever of a three point switch, a branch from the other main permanently connected to the lever of a second three point switch, contact points, two for each switch, the contact points of the two switches being connected together in pairs.

2. The combination with a translating device and a source of electricity permanently connected together, of a pair of switches, each provided with tWo contact points united In witness whereofl hereunto subscribe my 20 name this 2d day of April, A. D. 1889.

CHARLES E. SORIBNER.

\Vitnesses:

ELLA EDLER, Gno. R. PARKER. 

